Getting Started

To install Java, it is recommended to download an installer for the version of your choosing here: adoptium.net

1. Set the version of Java you want to install.

2. Download the .msi. It is not recommended to download the .zip archive if you are a beginner, as it is for manual installation.

3. Locate the file and double-click it in the File Explorer to run the installer, then follow the steps in the window.
   If you are asked to set the version you downloaded as the default across all applications, do not, as it could break other applications. For example, if you downloaded Java 17 and you set it as default, it could break anything using Java 8.

Follow these instructions to install Java on your Linux distribution using the package manager: Ubuntu / Debian:
sudo apt install openjdk-$version-jre (Replace $version with the version you want) Java 8 is specifically formatted as "8"

Fedora:
sudo dnf install java-$version-openjdk (Replace $version with the version you want) Java 8 is specifically formatted as "1.8.0"

CentOS / RHEL:
sudo yum install java-$version-openjdk (Replace $version with the version you want) Java 8 is specifically formatted as "1.8.0"

Arch Linux:
sudo pacman -S jre$version-openjdk (Replace $version with the version you want) Java 8 is specifically formatted as "8"

openSUSE
sudo zypper install java-$version-openjdk (Replace $version with the version you want) Java 8 is specifically formatted as "1_8_0"

If your distribution / package manager is not listed here, refer to their documentation.

To install Java, you can use Homebrew or download a pkg:

Homebrew:

1. First you need to add this repository: brew tap homebrew/cask-versions

2. Then install Java: brew install --cask temurin@$version
   Replace $version with the version you want
   Example: brew install --cask temurin@8

Download pkg:

1. Visit adoptium.net

2. Set the version of Java you want to install.

3. Depending on your Mac's CPU Architecture, select the .pkg to download.
   If you have an Intel CPU, select the x64 file.
   If you have an Apple Silicon CPU (M1, M2, etc.), select the aarch64 file.

4. Locate the file and double-click it in Finder to run the installer, then follow the steps in the window.

1. Open PrismLauncher's Settings using a button using the bar near the top of the window

2. Select Java from the sidebar

3. On the right, select Management

4. Click Download

5. A window will open where you can select whichever version of Java you want and download it.

1. Open the Settings menu using the Cogwheel / Gear button in the bottom left

2. Select Java Installations

3. On Java 21, 17 or 8 locations, select Install Recommended.

1. Sign in with your Microsoft account. In the top-right is a dropdown for Accounts, click it and select Manage Accounts, then in the new window, select Add Microsoft from the right-hand sidebar.

2. Close the previous window, then in the menu-bar at the top, select Add Instance.

3. If you want to create a custom Modpack with your own set of mods, select Custom, then the version of Minecraft you want, and the ModLoader you want, along with its version.
   

   Otherwise, if you want a prebuilt pack, select a Source from the left-hand sidebar, search for the one you want (if necessary), select it, the version, and then OK.

4. Depending on how many Mods your Modpack of choice includes, you may want to allocate more RAM:
   On the right-hand sidebar with the Modpack you downloaded, select Edit, then in the new window select Settings on the left-hand sidebar, check the Memory checkbox, and add the amount of RAM you wish to launch the Modpack with.
   

   Mebibyte	Gigabytes
   ~3800	4
   ~5700	6
   ~7600	8
   ~9500	10

   PrismLauncher uses Mebibyte (MiB) for Memory Allocation. The table above is a guide for how much they represent in Gigabytes (GB). For 98% of Modpacks, 8 GB is a sufficient amount, but you should always consult the ModPack's description for a recommended amount of allocated RAM. If you intend to play with Shaders, you should allocate a little extra, like 10 GB.

1. Sign in with your Microsoft account. On the right-hand sidebar, select the Select Account dropdown, then select the Not signed in button. Follow steps to sign in with your Microsoft account in the new window.

2. To download an existing Modpack, use the left-hand sidebar's Home and Discover tabs and find a Modpack you want.
   

   To create a custom Modpack, select the Create button in the left-hand sidebar, then fill out the Name, Icon, ModLoader and Minecraft Version.
   In the same menu, you can import Modpacks already on your computer, via File or Modrinth App can import from other Launchers.

3. Depending on how many Mods your Modpack of choice includes, you may want to allocate more RAM:

   If not open already, go to the left-hand sidebar and select your Modpack, or go to your Library and select it there. Then select the Settings button next to the Play button, in the menu select Java and memory, then under Memory allocated, drag the Slider or type how much RAM you wish to launch the Modpack with.

   Megabytes	Gigabytes
   4096	4
   6144	6
   8192	8
   10240	10

   Modrinth App uses Megabytes (MB) for Memory Allocation. The table above is a guide for how much they represent in Gigabytes (GB). For 98% of Modpacks, 8 GB is a sufficient amount, but you should always use what the Modpack author recommends.
   If you intend to play with Shaders, you should allocate a little extra, like 10 GB.